Time management is hard.
The best way to do it is to have a task list, also known as a to-do list.
And the best tool? Pen and paper. Yes, analog pen and analog paper.

However, it should not be your regular analog piece of paper. What I do
instead is printing out a nice template. A template crafted in
LaTeX, which is the best typesetting system for technical stuff
and technical people.

The goal of the project is to make a human-friendly, usable todo-list
templates to be used. The templates can also be filled in by
LaTeX itself, if you want and feel like installing a
LaTeX compiler (XeLaTeX to be precise) — for all the other
people, an empty template is available.